title: Letters to the editor.
authors.affiliation: Division of Cardiology, Department of Internal Medicine, The Catholic University of Korea, Seoul St. Mary's Hospital, Banpo-Dong, Seocho-Gu, Seoul, South Korea.
authors.forename: Dong-Bin
authors.initials: DB
authors.lastname: Kim
authors.forename: Sang Hong
authors.initials: SH
authors.lastname: Baek
mesh_terms: D005260:Female; D006333:Heart Failure / Q000503:physiopathology*; D006801:Humans; D035002:Lower Extremity / Q000098:blood supply*; D008297:Male; D034941:Upper Extremity / Q000098:blood supply*; D059289:Vascular Stiffness